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Zoology and wildlife conservation

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Abstracts » Zoology and wildlife conservation

Sound localization an neurons

Article Abstract:

The ability to locate where sound is coming from depends mainly on the different times taken for sound to arrive at each ear. Interaural time delays (ITDs) can be very small, and it is estimated by Fitzpatrick and colleagues that pooling of 40 thalamic neurons gives a resolution of 16 microseconds. Further studies indicated that human thresholds may be determined by far fewer cells. Receiver operating characteristic analysis was applied to previously published results, and results indicated that psychophysical thresholds could be even lower than 10 microseconds.

Author: Christian Skottun, Bernt
Publisher: Macmillan Publishing Ltd.
Publication Name: Nature
Subject: Zoology and wildlife conservation
ISSN: 0028-0836
Year: 1998
Research, Directional hearing, Sound localization

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Sensitization of meningeal sensory neurons and the origin of headaches

Article Abstract:

Chemical stimulation and enhanced mechanical sensitivity of meningeal afferents may be involved in the intracranial mechanical hypersensitivity that occurs in some clinically occurring headaches and throbbing pain of migraine. The activity of the primary afferent neurons of rat trigeminal ganglion, innervating the dural venous sinuses are observed. Stimulation using inflammatory mediators causes the neuron stimulation and increased mechanical sensitivity. This sensitivity makes the neurons excitable to mechanical stimuli which otherwise evoke no response.

Author: Burstein, R., Strassman, A.M., Raymond, S.A.
Publisher: Macmillan Publishing Ltd.
Publication Name: Nature
Subject: Zoology and wildlife conservation
ISSN: 0028-0836
Year: 1996
Causes of, Migraine, Headache

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Subjects list: Physiological aspects, Neurons
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